If sec 4A =cosec(A-20°) where 4A is an acute angle find the value of

1.	If sec 4A =cosec(A-20°) where 4A is an acute angle find the value of A
Answer» Thanks Sec 4A=sec(90°-(A-20°))4A=90°-A+204A=110-A5A=110A=110/5A=22°

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